[GHC] #3399: Generalize the type of Data.List.{deleteBy, deleteFirstsBy}

[GHC]

#3399: Generalize the type of Data.List.{deleteBy, deleteFirstsBy}
-------------------------------------+-------------------------------------
        Reporter:  iago              |                Owner:
            Type:  proposal          |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  libraries/base    |              Version:  6.10.4
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2526
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by mpickering):

 * status:  closed => new
 * differential:   => Phab:D2526
 * resolution:  wontfix =>
 * milestone:  Not GHC => 8.2.1


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3399#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler